<?
	function chong_pha_hoai(){
		
	}?>
    <?
	function thongbao($c)
	{
		//echo $c;
		?>
		<script>
			alert("<?php echo $c; ?>");
		</script>
        <?
	}
	function backpages()
	{
		?>
        	<script type="text/javascript">
				window.history.back();
            </script>
        <?
	}
	function chuyentrang($link)
	{
		?>
        <script type="text/javascript">
			window.location="<? echo $link; ?>";
		</script>
        <?
	}
	?>